Vandalizing public property, from a bridge to something as petty as a road sign. Extremists will scrawl an evangelistic message, for example "Jesus Saves" or "I love Christ", usually done in graffiti form using spray paint.
Meant to look charming and obedient to 'god, it's really only a childish shout, an attempt to shame people who do not believe in their god.
There are people out there that spring out of bed early in the morning, not to work or improve their life... but with an agenda to indoctrinate as many other people they can to their nutty club house.

"Some tweaker has evandalized the road signs."

"Evandalism is much more common in cities where people just enjoy being human."